A note before you read: This article is for general wellness information only — not medical advice. Arkas EVOO is a food product, and fish oil is commonly sold as a dietary supplement. Neither is a medicine. Always consult your doctor before adding or changing supplements, especially if you are on medication.

High Polyphenol Olive Oil vs Fish Oil: Why They Are Not the Same

If you are already taking fish oil and wondering whether high polyphenol olive oil does the same thing — it does not. They work differently. They address different things happening in your body. And for many people, both are worth taking as part of a daily routine.

If you have never taken either and are trying to figure out where to start — this post will help you understand what each one actually does, in plain language, without the jargon.

First: What Are the Healthy Fats in Each Oil?

You have probably heard the terms omega-3, omega-6, and omega-9. Here is what they actually mean — and where each oil sits.

Omegas are types of fatty acids — the building blocks of dietary fats. The number refers to where the first double bond sits in the molecular chain. What matters practically is that different omega types do different jobs in the body, and different oils contain them in very different proportions.

What is in Fish Oil

Fish oil is rich in two specific omega-3 fatty acids: EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid). These are long-chain omega-3s that the body cannot produce in meaningful quantities on its own — you have to get them from food or supplements.^[1] EPA and DHA are the active components behind the health benefits most people associate with fish oil — they are what the EU-authorised health claim for fish oil is based on.

Fish oil contains essentially no omega-9 and no polyphenols. Its value comes entirely from its EPA and DHA content.

What is in High Polyphenol Olive Oil

Olive oil has a very different fat profile. Here is how Arkas breaks down:

• Omega-9 (oleic acid) — approximately 70–80% of total fat. This is the dominant fatty acid in olive oil and what makes EVOO a staple of the Mediterranean diet. Omega-9 is a monounsaturated fat associated in research with heart-healthy dietary patterns.^[2] Fish oil contains very little omega-9.
• Omega-6 (linoleic acid) — approximately 10% of total fat. Present in olive oil, though not at levels that make it a meaningful omega-6 supplement source. Most people already get sufficient omega-6 from their regular diet.
• Omega-3 (alpha-linolenic acid / ALA) — approximately 1% of total fat. Olive oil contains a small amount of a short-chain omega-3, but not the EPA or DHA that fish oil provides. ALA has to be converted by the body to be useful, and this conversion is inefficient in most people.^[3] Olive oil is not a fish oil substitute for omega-3.
• Polyphenols — >800mg/kg (Arkas producer-provided laboratory testing; Certificate of Analysis available on request). This is where Arkas is fundamentally different from fish oil — and from most other olive oils. The polyphenol content is not a fat. It is a separate class of bioactive compound entirely, and it is what Arkas is specifically formulated to deliver.

So What Does Each One Actually Do?

Fish Oil: Supporting Your Heart and Reducing Triglycerides

The EU-authorised health claim for fish oil EPA and DHA covers two things: supporting normal heart function, and helping maintain normal blood triglyceride levels at higher doses.^[1] Triglycerides are a type of fat found in your blood — high levels over time are associated with cardiovascular risk. Omega-3 fatty acids from fish oil are among the most studied dietary supplements in the world for this purpose.

Think of fish oil as working on the composition of your blood fats — the levels and types of fat circulating in your bloodstream.

High Polyphenol Olive Oil: Protecting Your Blood Lipids from Oxidative Damage

The EU-authorised health claim for olive oil polyphenols — under Commission Regulation (EU) No 432/2012 — is specifically about protecting blood lipids from oxidative stress.^[4] What does that mean in plain language?

LDL is a normal lipid transport particle in the body. In cardiovascular research, oxidised LDL is often discussed because oxidative modification of LDL is associated with atherosclerotic processes.^[5] Polyphenols from high-quality olive oil act as antioxidants that may help protect LDL from that oxidative modification — which is the mechanism the EU 432/2012 health claim addresses.

So if fish oil works on what is in your blood, high polyphenol olive oil works on protecting what is already there from damage. Different problem. Different solution. Both relevant.

The Question Nobody Asks About Fish Oil: Where Does It Come From?

Here is something worth thinking about before you buy your next bottle of fish oil.

A Sourcing Question Worth Asking About Fish Oil

Because fish oil is marine-sourced, sourcing and purification quality matter. Marine pollution — including microplastics — has become a recognised food-safety discussion in seafood and marine-derived products.^[6] This does not mean fish oil should be avoided — EPA and DHA remain well-studied nutrients with established health claims. But it does mean consumers are increasingly asking questions about where their fish oil comes from, how it is purified, and whether it carries third-party testing certification. These are reasonable questions to ask of any marine-sourced supplement.

Arkas EVOO has a different sourcing pathway. It is land-based, single-origin, and cold-pressed from olives in Olympia, Greece. This does not make it a replacement for fish oil — the two supplements address different nutritional roles entirely. But it does make its sourcing story simpler and easier to understand.

This is not a claim that olive oil is a replacement for fish oil. It is an observation about sourcing transparency that is worth factoring into how you build your supplement routine.

Do You Need Both?

For most adults who train regularly or are paying attention to long-term wellness — the honest answer is that both address things the other does not. Here is a simple way to think about it:

• If your goal includes supporting triglyceride levels and getting EPA/DHA your diet may not provide — fish oil is relevant.
• If your goal includes protecting your blood lipids from oxidative damage with polyphenol antioxidants — high polyphenol olive oil is relevant.
• If both are relevant to you — and for many people they are — both have their own EU-authorised health claims, distinct mechanisms, and a clear place in a daily routine without overlap or competition.

Whether either or both are appropriate for your specific health circumstances is a conversation for your doctor — particularly if you are on any medication.

A Quick Side-by-Side

	Arkas High Polyphenol EVOO	Fish Oil (EPA/DHA)
Main healthy fats	Omega-9 (~75%), trace omega-6 and omega-3	Omega-3 (EPA + DHA)
Polyphenols	Yes — >800mg/kg (Arkas producer-provided laboratory testing; CoA on request)	None
What it does	May help protect blood lipids from oxidative damage	Supports normal heart function and triglyceride levels
EU health claim	Yes — EU 432/2012 (polyphenols / blood lipid oxidation)[4]	Yes — EU 432/2012 (EPA/DHA / cardiac function / triglycerides)[1]
Sourcing	Land-based — cold-pressed olives, Olympia Greece. No marine-source microplastic pathway.	Marine — fish (sourcing, purification and third-party testing vary by brand)[6]
How to take	RealFUEL+ starter protocol: 1 teaspoon (~5ml), empty stomach, morning. Arkas packaging states a recommended daily intake of 12ml.	With food — dose per product label and EPA/DHA concentration
Do they overlap?	No — different mechanisms, different compound classes, complementary

References & Sources

1. EFSA Panel on Dietetic Products, Nutrition and Allergies (NDA). Scientific Opinion on the substantiation of health claims related to EPA, DHA and normal cardiac function; maintenance of normal blood triglyceride levels. EFSA Journal. 2010;8(10):1796. DOI: 10.2903/j.efsa.2010.1796
2. Schwingshackl L, Hoffmann G. Monounsaturated fatty acids, olive oil and health status: a systematic review and meta-analysis of cohort studies. Lipids in Health and Disease. 2014;13:154. PMID: 25274026. DOI: 10.1186/1476-511X-13-154
3. Burdge GC, Calder PC. Conversion of alpha-linolenic acid to longer-chain polyunsaturated fatty acids in human adults. Reproduction, Nutrition, Development. 2005;45(5):581–597. PMID: 16188209. DOI: 10.1051/rnd:2005047
4. European Commission. Commission Regulation (EU) No 432/2012 of 16 May 2012 establishing a list of permitted health claims made on foods. Official Journal of the European Union, L 136, 25.5.2012. eur-lex.europa.eu
5. EFSA Panel on Dietetic Products, Nutrition and Allergies (NDA). Scientific Opinion on the substantiation of health claims related to polyphenols in olive and protection of LDL particles from oxidative damage. EFSA Journal. 2011;9(4):2033. DOI: 10.2903/j.efsa.2011.2033
6. Barboza LGA, Vethaak AD, Lavorante BRBO, Lundebye AK, Guilhermino L. Marine microplastic debris: an emerging issue for food security, food safety and human health. Marine Pollution Bulletin. 2018;133:336–348. PMID: 30041439. DOI: 10.1016/j.marpolbul.2018.05.047

One Part of Your Daily Wellness Stack

Arkas High Polyphenol EVOO is available in Singapore through RealFUEL+.

Supported by Arkas producer-provided laboratory testing showing >800mg/kg total polyphenols, with Certificate of Analysis available on request, and aligned with the EU 432/2012 olive oil polyphenol health-claim framework.

RealFUEL+ uses one teaspoon — approximately 5ml — as a practical starter protocol for daily habit-building. Arkas packaging states a recommended daily intake of 12ml.

Fish oil and Arkas are not substitutes. They support different nutritional roles in a daily routine.

Shop Now - 90 Days Wellness Program

Read the full series:
→ Post 01: The Science Behind High Polyphenol Olive Oil
→ Post 02: High Polyphenol vs Regular EVOO — Why the Label Tells You Nothing
→ Post 03: The 90-Day Olive Oil Challenge — What the Science Says
→ Post 04: High Polyphenol Olive Oil in Singapore — A Daily Wellness Habit Worth Starting
→ Post 05: Why You Should Take Olive Oil on an Empty Stomach Every Morning
→ Post 06: Olive Oil and Gut Health — What Polyphenols May Do for Your Microbiome
→ Post 07: Olive Oil and Healthy Aging — What the Mediterranean Research Suggests

Frequently Asked Questions

Q : Should I take olive oil or fish oil?

A :They do different things, so the question is less "which one" and more "which applies to my goals." Fish oil provides EPA and DHA omega-3 fatty acids associated with heart function and triglyceride support.^[1] High polyphenol olive oil provides polyphenols associated with protecting blood lipids from oxidative damage.^[4] Many people take both as part of a daily routine. Speak to your doctor about what is right for your specific circumstances.

Q : Does olive oil have omega-3?

A : Olive oil contains a small amount of ALA — a short-chain omega-3 — but not the EPA and DHA found in fish oil. ALA has to be converted by the body into EPA and DHA, and this conversion is inefficient in most adults.^[3] Olive oil is not a substitute for fish oil as an omega-3 source. They are different products serving different purposes.

Q : Should I be concerned about microplastics in fish oil?

A : Marine pollution — including microplastics — has become a recognised food-safety discussion in seafood and marine-derived products.^[6] This does not mean fish oil should be avoided — EPA and DHA remain well-studied nutrients. It does mean sourcing and purification quality matter when choosing a fish oil product. Look for brands with clear sourcing disclosure and third-party testing certification. Arkas EVOO has no marine-source microplastic pathway — it is land-based, single-origin, and cold-pressed from olives in Olympia, Greece. It does not replace fish oil; it addresses a different nutritional role entirely.

Q : Can I take Arkas EVOO and fish oil on the same day?

A : At typical supplement doses, there are no established interactions between olive oil polyphenols and fish oil omega-3 fatty acids. However, both have been explored in research for effects on blood-related activity, and anyone on anticoagulant or blood-thinning medication should consult their doctor before taking either or both. This is general information — not medical advice specific to your circumstances.

Q : What does omega-9 in olive oil do?

A : Omega-9 (oleic acid) is the dominant fatty acid in olive oil — typically around 70–80% of total fat content in a high-quality EVOO like Arkas. It is a monounsaturated fat that has been studied in research on heart-healthy dietary patterns and is a central component of the Mediterranean diet.^[2] Unlike omega-3 and omega-6, omega-9 is not considered an essential fatty acid because the body can produce it — but dietary sources like EVOO are associated with beneficial fat profiles in research populations.